lewis sagendoeph



UNITED STATES PATENT OFFICE.

L. LEWIs SAGENDORPH, OF OINOINNATI, OHIO, ASSIGNOB TO THE NEW YORK IRONROOFING AND PAINT COMPANY, OF NEw YORK, N. Y.

PROCESS OF MANUFACTURING ROOFING MATERIAL.

SPECIFICATION forming part of Letters Patent No. 255,088, dated March14,1882,

Application filed November 26, 1881.

To all whom it may concern:

Be it known that l, L. L WIS SAGENDORPH, a citizen of the United States,and a resident of Cincinnati, in the county of Hamilton and State ofOhio, have invented anew and useful Process of Manufacturing RoofingMaterials, of which the following is a specification.

The object of my invention is to produce a material for covering theexteriors or roofs of buildings, the decks of Vessels, and otherlikestructures which are exposed to the weather and which require to be madeboth fire and water proof.

In carrying out my invention I first prepare a liquid mixture havingsubstantially the characteristics of a metallic paint, which may consistof any suitable metallic substance, preferably an oxide of iron, whichis reduced to a finely-divided state andincorporated with a suitablevehicle-such as linseed or other oil. I place a sufficient quantity ofthis mixture in a, suitable vessel. I then take a piece of fibrous ortextile material, preferably duck or canvas, of any required length, andcause the same to pass continuously through the said liquid mixture, bywhich operation the fibrous material becomes partially or whollysaturated with the mixture, a considerable quantity of which alsoadheres to its surfaces. After the fabric has been thus saturated andcoated it is immediately made to pass slowly between steel or ironrollers in a manner well understood, and is thereby subjected to heavypressure, by which operation the mixture is forced into all the meshesand interstices of the fabric, while the surplus adherent material is atthe same time removed. After the completion of this operation the fabricis exposed to the atmosphere and allowed to dry and become hard. I thenpass the fabric a second time through the same or a similar mixture andthrough the compressing-rollers in the same manner as before,wherebyitssurface receives an additional coating of the material, andany crevices or interstices which may have been imperfectly filled bythe previous operation are closed, and the whole surfacerendered compactand homogeneous. Immediately after passing the second time be- (Nospecimens.)

tween the compressing-rollers, and while the surface of the fabric is inan adhesive condition, hydraulic cement of any suitable kind, in a drypulverulent condition, is applied on one side only of the fabric.

The adhesive character of the mixture will cause the fabric to retainupon its surface a thick coating of the powdered cement, and the wholeis then allowed to dry, after which it is ready for use.

It. may be sufficient for some purposes to pass the fabric between thecom pressing-rollers but once, and immediately thereafter to apply theartificial stone or cement facing; but I consider it preferable tosubject the material a second time to the process of saturation andcoating with the mixture before applying the facing, as hereinbefore setforth.

The object in applying the powdered cement is for the purpose ofpreserving and protecting the metallic paint, and also to prevent thecompleted fabric from becoming adherent when put up in rolls forshipment.

When employed as a roofing material the cement protects the metallicsubstance from the injurious effects of moisture and the rays of thesun, inasmuch as when moisture comes for the first time in contact withthe cement surface it immediately converts it into an artificial stone,which renders the roof abso lutely fire-proof. When used for coveringthe deck of a steamboat or other vessel the surface may be walked uponwithoutinjury to the fabric which forms its basis.

I prefer to use for forming the artificial- .stone facing some one ofthe well known hydraulic cements-such, for example, asthat commerciallyknown as Neufchatel stone or Portland cement.

Any machinery adapted for the purpose may be employed in carrying outthe process hereinbefore described. Such machinery, however, forms nopart of the invention hereinafter claimed, and hence need not beparticularly described.

I claim as my invention- The hereinbefore-described process ofmanufacturing roofing material, which consists in saturating a fibrous0r textile fabric with a liquid mixture composed of metallic substance Iscribed my name this 22d day of November, and oils, substantially suchas described, in I A. D. 1881. subjecting the saturated fabric topressure while in a. plastic state, and in coating the sur- 5 facethereof with hydraulic cement in a dry pulverulent condition. a

In testimony whereof I have hereunto sub- L. LE WIS SAGENDOR PH.

Witnesses:

CHAS. S. HOLMES, H. E. WOODROW.

